Kérastase Specifique Cure Anti-Pelliculaire is an at home treatment which helps eliminate dry and oily dandruff to purify the scalp. This cure is a 4-week treatment with 3 applications per week. 1 vial per application. Apply to dry or towel-dried hair. Distribute onto the scalp section by section, massage with fingertips, proceed with usual styling. Leave-in treatment. Do not rinse out.